Chuck



June 21, 1932. A. EIDAM 1,864,191

CHUCK Filed May 5, 1928 Patented June 21, 1932 UNITED STATES ADAM EIDAM,F HAZLETON, PENNSYLVANIA CHUCK Application filed May 5, 1928. Serial No.275,278.

My invention relates to a chuck or holding device which is adapted tohold objects while the latter are being subjected to some action ortreatment such as a polishing or rubbing treatment.

The device may be employed for holding articles of various kinds but itis designed for holding an object of ring or annular shape andespecially it is designed for holding spinning rings while the latterare being rubbed and polished to smooth the same.

Spinning rings are employed in the silk throwing art, and perhaps inother arts, for supporting travelers which move thereon. The rings inuse become roughened and the presence of the roughened portions resultsin the cutting or breaking of the threads which are supported in thetravelers, which travel upon the spinning rings. It is necessary,therefore, from time to time to polish the spinning rings in order toremove therefrom the roughnesses which makev their appearance thereon.Heretofore these rings have been supported in one hand, or manually, andthe rubbing and polishing operation effected by means of apolishingdevice held in the other hand. In other words, the polishing of theserings has been a wholly manual operation. The polishing of a ringmanually requires an excessively long period of time and is thereforerelatively very expensive. Attempts heretofore have been made to providemechanical means to be employed in the process of polishing spinningrings but such attempts have proved unsuccessful.

It is a general object of the present invention to provide mechanicalmeans for supporting and actuating a spinning ring during the process ofpolishing the same to remove therefrom roughnesses produced in the usethereof.

Another object of the invention is to provide a rotatable device havingmeans upon the holding or working face thereof for engaging and holdingthe flanged edge of a spinning ring, the said holding means beingadapted to be released at will.

Another object of the invention is to pro vide a rotatable member havingholding means upon the front or Working face thereof which is adapted tohold an annular memher, for example a spinning ring, and also havingmeans whereby the efficiency of the holding means is increased withincreased speed of rotation.

It is also a further object of the invention to provide a holding devicehaving stationary and movable holding means upon its front or workingface which are adapted to engage the outer'peripheral surface of anobject to be held thereby, the said movable means being held in yieldingholding position and having connected therewith a member actuated bycentrifugal force whereby the holding action of the said movable holdingmeans is increased with acceleration of rotation of the said rotatabledevice. 7

Other objects and advantages of the invention will occur to thoseskilled in the art and furthermore other additional objects andadvantages will be pointed out in the detailed description of theinvention which follows or will be apparent therefrom.

In order that the invention may be easily understood and its practicaladvantages fully appreciated reference should be had to the accompanyingdrawing in which I have illustrated. one form of a convenient mechanicalembodiment thereof. It is to be understood that the invention issusceptible of embodiment in other forms of construction than that shownand that in the drawing I have merely illustrated that form ofembodiment of the invention which at present is preferred by me.

In the drawing:

Fig. 1 is a view partly in sectional and partly in edge'elevation of adevice embodying the invention and showing also in eleva- 90 tion themeans for supporting and effecting rotation thereof;

Fig. 2 is a view in front elevation of the device embodying theinvention;

Fig. 3 is a view in rear elevation thereof, 9 5 the said view beingtaken on the line 3-3 of Fig. 1;

Fig. 4 isa similar View showing a movable part of the structure in adifferent position from that in which it is shown in Fig. 3;

Fig. 5 is a view in transverse section of a fragmentary portion of thestructure showing a detail of the construction, the said view beingtaken on the line 55 of Fig. 2; and

Fig. 6 is a similar view showing a slight modification of the structure.

In the drawing I have shown a fragmentary portion of an electric motor1, one end of the shaft of which projects as indicated at 2. The deviceembodying my invention is mounted upon the projecting end portion of thesaid shaft and rotates therewith. The device of my invention comprises adisk 3 preferably of circular shape which has upon its rear side a bossor projection 4 through which and also through the centerof the disk 3an opening 5 extends for the reception of the projecting end portion 2of the motor shaft. The projection or boss 4 is provided with ascrew-threaded opening 6 for the reception of a binding screw 7 by meansof which the device constituting the invention is secured in relativelystationary position upon the said shaft. Preferably the front side ofthe disk 3 is hollowed out or formed which the circular member which isto be treated is mounted and held by means hereinafter to be described.In the construction as illustrated the object to be held and to betreated or processed consists of a spinning ring 15, which in crosssection may be described as of double T-shape; or, to illustrate. it isof a shape in cross section somewhat similar to the cross section of therails of a railway track. The ring is provided with outwardly extendingflanges 16 and 17 at its opposite sides either of whichis adapted to beengaged by the holding means previously referred to and which will behereinafter described. It will be noted that the web of the ring in thespecific construction illustrated is provided in the equatorial planethereof with a thickened portion, as indicated at 18. The ring asillustrated is of known construction and it will be understood that thedevice embodying my invention is capable of holding and is adapted tohold rings of other constructions, provided only that they have meansadapted to be en aged by the holding means of the device.

The holding means of the device of the construction as illustrated,which is at present preferred by me, comprises stationary hook-likeprojections 20 and 21 integral with the disk 3 and located in adjoiningrelation to the periphery thereof. The said holding means are locatedupon and project from the front face of the disk 3. The third of theholding means comprises a cylindrical section 22 which may be describedas being located at the apex of an isosceles triangle with theprojections 20 and 21 occupying positions at the opposite ends of thebase thereof.

The cylindrical section 22 is rotatably mounted in an opening 23 in thedisk 3 near or in adjoining relation to a point in the peripherythereof. The front end of the said cylindrical section 22 is providedwith a flanged head 25 a portion of which is cut away, as indicated at26, to form a flat side which is adapted to be adjusted into a positionat right angles to a radial line from the axis of the disk 3. Theadjustment of the cylindrical section 22 into such position is for thepurpose of permitting the placing of the ring 15 in position upon thedevice, as will be hereinafter described. The rear end of the section 22which projects beyond the rear side of the disk 3 is squared, asindicated at 27, and projects through a squared opening 28 provided nearone end and joining the outer edge of an irregularly curved or shapednarrow plate 30. The opening in the plate 30 fits closely the squaredend portion 27. A washer 31 mounted uponthe squared end portion 27 islocated between the said plate and the adjoining rear side of the disk3. The outer end of the projection 27 is provided with a cross pin 32underneath which is located a washer 33. A coiled spring 40 connected atone end to an extension 41 of the plate 30 and at its opposite end to astationary pin 42 projecting from the rear side of the disk 3 holds ortends to hold the section 22 in such position that the corner portion 43of the flanged head 25 engages the adjoining peripheral edge portion ofthe ring15 or some part or portion of other work as the case may be. Theplate 30 provides means whereby the cylindrical section 22 may beadjusted in its bearing to adjust the flanged head 25 into any positiondesired. For the purpose of facilitating the adjust.- ment of the plate30 I have provided in adjoining relation to the end thereof oppositethat to which the spring 40 is connected a finger piece 45. When it is'desired to insert a ring in place the plate 30 is turned so as to movethe longer end portion thereof toward the projection or boss 4, asindicated in full lines in Fig. i of the drawing. When thus turned thecylindrical section 22 is turned sov as to position the flat edge 26 ofp the head 25 in a plane or line at right angles to a radial line fromthe axis of the disk 3. When in such position a flange of the ring 15may be inserted underneath the projecting edges of the projections 20and. 21, as indicated in Fig. 2, after which the ring is laid with itsside in adjoining relation to the disk 3 against the front surfacethereof, whereupon, upon releasing the plate 30, the spring 40 operatesto turn the said plate and the section 22 so as to cause the cornerportion 43 to engage the adjoining flange of the ring 15, as isillustrated in Figs. 1 and 2.

To facilitate the insertion of the ring into position I have provided ata point in opposed relation to the cylindrical section 22 and theflanged head 25 thereof an angular groove 50 of arc shape, into whichthe outer edge portion of the adjoining side of the ring 15 may beinserted, the said ring occupying at such time an angular position withrelation to the front face of the disk. The holding of the said ring insuch angular relationship facilitates the insertion of the flanged edgethereof into the notches provided upon the inner sides of theprojections 20 and 21.

As has been indicated already, the spring 40 after a ring is in positionoperates automatically to adjust the cylindrical section 22 to cause thecorner portion 43 of the head 25 thereof to engage the adjoining portionof the flange of the ring 15.

When the plate 30 is adjusted or swung inwardly, as indicated in fulllines in Fig. 4, in opposition to the action of the spring 40 itsmovement is limited by the contact of the inner edge thereof with theprojection 4.

It will be apparent that upon rotation of the disk 3 the force ofcentrifugal action on the longer end portion of the plate 30 causes ortends to cause the said plate to turn about the axis of its pivot, thesaid longer end portion moving or tending to move outwardly. If a ring,such as 15, or other work is present the extent of pivotal movement ofsaid plate is limited by the engagement of the forward or front endportion of the pivot or cylindrical section 22 with said ring or otherwork; but if no ring or other work is present the extent of such pivotalmovement is limited by the engagement or contact of the outer edge ofthe longer end portion of the plate with the inner side of therearwardly extending peripheral flange 51 or other stop which may besubstituted for or provided in lieu of such flange. It will be apparentthat by limiting the outward swinging movementof the longer end portionof the plate as described the safety of the device is increased. If thelonger end of said plate were allowed to swing outwardly so as to extendbeyond the periphery of the disk it will be apparent that the projectingportion thereof might strike a person using the device and cause seriousinjury. It also will be apparent that the holding action or force of theengaging head 25 upon or against the ring 15 increases with the increaseof the speed of rotation of the disk. In other words, the holding forceincreases with the increase of the centrifugal force applied to theplate 30.

Instead of the stationary holding devices 20 and 21 being formedintegrally, as is pre ferred, with the disk 3 the said holding devicesmay be formed of separate plugs or pins 52 mounted in openings 53 andterminating at their front ends in hooked projections 54 correspondingto the hook-like portions of the projections 20 and 21. The other endsof the plugs or pins 52 are upset, as indicated, for the purpose ofsecuring the said plugs or pins permanently in the openings 53 providedtherefor.

. In the use of the device a ring to be polished is mounted uponthe'front face of the device and held thereon by the holding means, asdesired, "first with one side and then with the other of said ringagainst the face of the holder, and as the latter is rotated to causerotation of the ring a polishing tool'may be applied to the front sideor surface of the ring and the polishing thereon quickly effected. lVhenone side has been polished the ring may be reversed in its position inthe holder and the opposite side thereof then polished.

It will be seen that by means of a device embodying my invention thepolishing of a ring may be effected in a very short period of time,thereby effecting great economy, because heretofore polishing of ringsof the character of that illustrated has required a relatively longperiod of time-usually many minutes. By the employment of my invention aring may be polished in a minute or two.

Having thus described my invention, what I claim and desire to secure byLetters Patent is: l

1. A work holding device of the character described comprising a mainbody portion having holding means located thereon positioned at pointscorresponding to the corners of an isosceles triangle, two of the saidholding means being fixed in relation to the said portion and the otherof said holding means being adjustable, and the said main body portionhaving an arc-shaped groove angular in cross section in its front facelocated at a point midway between the fixed holding means and in opposedrelation to the adjustable holding means, and means for automaticallyadjusting the said adjustable holding means into holding position afterthe work has been placed in position upon the front face of the saidmain body portion.

2. In a chuck, the combination of a head, means for rotating the same, aplurality of fixed work-holding members and a movable work-holdingmember secured to the head for clamping work on the head, and meanscarried by said movable member adapted to 1 be actuated by centrifugalforce induced by rotation of the head for holding the said movablemember in contact with the work.

3. In a chuck, the combination of a head, means for rotating the same, aplurality of fixed work-holding members and a movable work-holdingmember secured to the head for clamping work on the head, resilientmeans between the movable work-holding member and the head for retainingthe mov- Y able work-holding member in clamping position, and meanscarried by said movable member adapted to be actuated by centrifugalforce induced by rotation of the head for holding the said movablemember in contact with the Work.

In testimony that I claim the foregoing as my invention, I have hereuntosigned my name this 1st day of May, A. D. 1928.

ADAM EIDAM.

